Machine for sharpening the calks of horseshoes.



PATENTED- SEPT. 18, 1906.

J. G; SPROAT.

MACHINE FOR SHARPENING THE OALKS OF HORSBSHOES.

APPLICATION FILED 0OT.9, 1905.

v witnesses snmorcu, u. c,

JOSEPHUS CLARK SPROAT, OF GRAND RAPIDS. MICHIGAN.

MACHINE FOR SHARPENING THE CALKS OF HORSESHOES.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed October 9, 1905. Serial No. 282.033.

T0 (tZZ whom, it may concern:

Be it known that I, J OSEPIIUS CLARK SPROAT, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Machines for Sharpening the Calks of Horses Shoes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in machines for sharpening the calks of horses shoes, and more particularly to manually-operated machines of this class; and its object is to provide a convenient, effective, and durable device and to provide the same with various new and useful features hereinafter more fully described, and particularly pointed out in'the claims, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of a device embodying my invention; Fig. 2, an enlarged plan view of the operative part of the same; Fig. 3, a vertical section on the line 3 3 of Fig. 2 Fig. 4, an enlarged detail of one of the cutters; Fig. 5, a detail of the adjustable support 14, and Fig. 6 the same of one of the supports 12.

Like numbers refer to like parts in all of the figures.

1 represents a portable platform on which the device is mounted; 2, a standard supporting the operating mechanism and provided with a convex top 3, having a transverse slot 4. On this convex surface is adjustably supported a head 5, having a concave under sur face 6, fitting the upper surface 4 of the standard 3 and adjustable about the axis thereof. This head is held immovable by means of a bolt 7, extending through the head and adjustable in the slot 4. A rotative cylindrical cutter 8 is journaled in upwardly-projecting lugs 9 and extends across the head 5 near one side thereof, and a simi lar cutter 10 is journaled in extensions 11 at the other side of the head. Adjustably secured to the side of the head adjacent to the cutter S are a series of adjustable supports 12, secured in place by screws 13, extending through vertical slots 24, whereby these supports may be severally adjusted with the upper edge opposite the cutter 18 and at a distance therefrom. These supports are at differentdistances and superposed, and any one may be raised for use and adjusted vertically as occasion requires.

Adjustably secured to the ends of the projections 11 is a support 14, having vertical slots 23 and adjustably held by screws 15. The head 5 is also provided with inclined surfaces 16 and 17 adjacent to the respective cutters to engage the calks of the shoe and hold the same in contact with the respective cutters and also to limit the operation of the cutters to the ends of the calks. Each cutter is provided with. teeth 18 in the form of the teeth of a rasp, whereby the material of the calk is removed as the cutter is rotated. IIeretofore in such machines ordinarymillingcutters have been used. My improved cutter takes hold of the metal more freely and operates much easier, which is important in manuallypperated devices. It also does not tend to slide the shoe endwise of the cutter, as does the spiral mill. To rotate these cutters, the journals at each end are outwardly ex tended and flattened on one side, as at 19, and a crank 20 is provided, having a socket therein adapted to fit the extended and flattened bearing of the cutter, and also provided with a set-screw 22 to securely hold the crank in place thereon. By extending both ends of both cutters the crank can be attached to either cutter at either end, as found most convenient.

In operating the device the toe-calk of the shoe is presented to the cutter S with its rear surface in contact therewith, and the front of the hoof to which the shoe is attached is brought in contact with one of the supports 12, which by its adjustment will determine the angle at which the cutter will engage the toe-calk and will also afford a fulcrum on which the hoof can be used as a lever to force the calk in contact with the cutter. The heel-calks are sharpened by means of the cutter 10 by presenting the forward surface of the calk to the surface of the cutter adjacent to the head and with the calk engaging the in clined surface 17 and the bottom of the shoe resting upon the support 14, which latter by its vertical adjustment determines the angle at which the calk is presented to the cutter.

In sharpening the respective heel and toe calks the head 5 is adjusted at an inclination to the horizontal to properly engage the shoe and permit of holding the foot of the animal in comfortable position.

Having thus fully described my invention, What I claim, and desire to secure by Letters Patent, is

1. The combination of a head, means for supporting and adjusting the head, a rotary cutter j ournaled on the head and an adjustable support attached to the head, opposite the cutter, and spaced apart therefrom.

2. The combination of a head having an inclined surface, a rotary cutter near one edge of said surface and parallel therewith, and a vertically-adjustable support attached to the head near the cutter and spaced apart therefrom. I

3. The combination of a standard having a convex and slotted upper end, a head having a concave lower side, a, bolt adjustable in the slot and extending through the head, a cutter journaled on the head, and an adjustable support attached to the head, and spaced apart from the cutter.

4. The combination of a standard, a head adjustably supported on the standard and having oppositely-inclined surfaces, cylindrical rotary cutters journaled on the head near said surfaces, and a vertically-adjustable support near each cutter and spaced apart therefrom.

5. The combination of a movable platform, a standard mounted thereon and having a convex and slotted upper end, a head having a concave under side engaging said convex end, a bolt adjustable inthe slot and extending through the head, a cylindrical and rotative cutter at each side of the head, and a vertically-adjustable support near each cutter and spaced apart therefrom.

6. The combination of a head having an inclined surface, a cylindrical and rotative cutter near one edge of said surface, and a series of superposed and sep arately-adjustable supports near the cutter and spaced apart therefrom at various distances.

7. The combination of a head having oppositely-inclined surfaces, cylindrical and rotative cutters journaled in the head and near one edge of the respective surfaces, means for adjustably supporting the head, a vertical adjustable support opposite one cutter, and a series of sep arately-adjustable concavoconvex supports opposite the other cutter.

In testimony whereof I affix my signature in presence of tWo Witnesses.

JOSEPHUS CLARK SPROAT.

Witnesses LUTHER V. MoULToN, GEORGIANA CHAoE. 

